Actually I can reproduce it on the addthis home page
http://www.linkedin.com/shareArticle?mini=true&url=http%3A%2F%2Fspectrum.ieee.org%2Fat-work%2Feducation%2Freview-mitxs-online-circuit-design-and-analysis-course%23.UAgvfMKfsPY.linkedin&title=Review%3A+MITx%E2%80%99s+Online+Circuit+Design+and+Analysis+Course&ro=false&summary=&source=
the following is the error
We’re sorry. Something unexpected happened and your request could not be completed. Please close this window and try again.
Please help to fix the issue
Thanks
Parth Bulusu